Video signal processing apparatus

Details Video signal processing apparatus Video signal processing apparatus

1986-04-01

1988-07-26

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 36, H04N 521, H04N 964

Patent

active

047604492

ABSTRACT:
A video signal processing apparatus incorporates a 1H or 2H delay circuit, wherein H is a horizontal synchronization period. The output of the delay circuit is fed back to the input thereof so as to average the noise, thus raising the signal S/N ratio. The feedback line includes a nonlinear processing circuit which has a small gain when the signal input has a low vertical correlation, whereby the signal S/N ratio is improved without causing the delay of the color signal in the vertical direction nor the deteriorated resolution of the luminance signal.

REFERENCES:
patent: 4355333 (1982-10-01), Sato
patent: 4571613 (1986-02-01), Fukuda
patent: 4677486 (1987-06-01), Noda

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